Nannotax3 - ntax_mesozoic - Crucibiscutum gracile

Crucibiscutum gracile


Classification: ntax_mesozoic -> Podorhabdales -> Biscutaceae -> Crucibiscutum -> Crucibiscutum gracile
Sister taxa: C. hayi, P. quadriperforatus ⟩⟨ C. bastetanum, C. gracile, C. neuquenensis, C. pinnatus, C. ryazanicum, C. salebrosum, C. trilensis, C. sp.

Distinguishing features:
Parent taxon (Crucibiscutum): Elliptical with prominent, birefringent, axial cross.
This taxon: Small (3.5-5 µm) sub-circular or broadly elliptical, central area wide, cross bars slender


Taxonomy:

Citation: Crucibiscutum gracile Aguado, in Aguado et al 2022
Rank: species

Farinacci & Howe catalog pages: C. gracile *

Distinguishing features:
Parent taxon (Crucibiscutum): Elliptical with prominent, birefringent, axial cross.
This taxon: Small (3.5-5 µm) sub-circular or broadly elliptical, central area wide, cross bars slender


Morphology:

The central area is wide (around twice as wide as the rim width) and partially covered by a slim bright cross with arms aligned with respect to the axes of the ellipse defined by the rim. The central cross is slightly brighter under XPL when oriented at 45◦ than when oriented to 0◦. [Aguado et al. 2022]

Size:

Search data:
LITHS: placolith, elliptical, CA: cross-axial, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 0->0µm;
Data source notes: Aguado et al. 2022
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NC6 zone (123.88-126.40Ma, top in Aptian stage). Data source: Aguado et al. 2022
First occurrence (base): within NC5e subzone (126.40-127.31Ma, base in Barremian stage). Data source: Aguado et al. 2022

Plot of occurrence data:

References:

Aguado, R., Company, M., O'Dogherty, L., Sandoval, J. & Martinez, M. (2022). New insights into the Barremian–lower Aptian calcareous nannofossils of the Mediterranean Tethys: Chronostratigraphic and paleobiogeographic implications. Marine Micropaleontology. 173: 1-24. gs V O


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Crucibiscutum gracile compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 7-10-2022

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11409 Go to Archive.is to create a permanent copy of this page - citation notes



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